I have an old iMac that is running on OS X 10.6.8 and all of the new Xcodes aren't available on a Mac like mine. Could someone please tell me how to download an older version of Xcode that is available for my Mac. Also, if I download this older version, will people that are on iOS 8/9 be able to go on them? I'm guessing that in the app description it will say availble for iOS 5 and so on? Thanks for all your help!